If you are caught in an emergency situation where you are stranded and can't get home chances are a backpack filled with life sustaining supplies (food, water, shelter, warmth) will be of much more value than a few guns and a couple thousand rounds of ammo stashed in the spare tire compartment.

Everyone likes to envision these scenarios where they are fighting off hoards of evil doers with their weapons of justice. A more likely scenario is being cold, miserable and thirsty as sh*t while not being able to find any potable water.